Yyyep. It's Error #17540 according to StuffIt Expander (and other programs give other errors). If I type in gibberish for the password and try that, the program closes without an error.

I don't know what "StuffIt Expander" is but there ain't nothin' betta then Winrar! So you should download that, install it, then right click the downloaded file, select "Extract here", insert password, done.
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How exactly do i get this ost? I know i'm supposed to copy the url but for some reason its about four lines long and doesn't work. And the other link sends me to the VGBM site but there's no option to download the tracks or to even preview them!
Sorry for the trouble but i'm a little confused here.

How exactly do i get this ost? I know i'm supposed to copy the url but for some reason its about four lines long and doesn't work. And the other link sends me to the VGBM site but there's no option to download the tracks or to even preview them!
Sorry for the trouble but i'm a little confused here.

Copy and paste the link. Start with the "http" part until you get to one before the "]" part.